c++ - Directly using the constructor of class in other class constructor -

i have this:

class point{ public:     point()=default;     point(int x,int y):x(x),y(y){}     int x,y; }

and this:

class quad{ public:        quad()=default;     quad(point a,point b,point c, point c):a(a),b(b),c(c),d(d){};      point a,b,c,d; }

in main, can this:

point a(0,0),b(1,1),c(2,2),d(3,3); quad q(a,b,c,d);

or directly this:

quad q(point(0,0),point(1,1),point(2,2),point(3,3));

but of course not this:

quad q(0,0,1,1,2,2,3,3); // know it's wrong

the question:

is possible without declaring new constructor take 8 integers in quad use last code? motivation of question way emplace_back works. more clear:

std::vector<point> points; points.push_back(point(0,0)); // have pass object points.emplace_back(0,0);  // have send arguments of constructor

this not possible without declaring new constructor.

one option pass in brace initializers each of points:

quad q({0,0},{1,1},{2,2},{3,3});

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